You see The Blightfather
Notes
It is the Lancer Beetles' boss that spawn with their raid on Muggy Plains.
Abilities
Melee (0-?), Invisibility, makes you Cursed (damage raises up to ?), Poison Bomb (around itself), summons 0-2 Lancer Beetles.
Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire
Energy
Earth
Location